GHSA-273p-m2cw-6833

Suggest an improvement
Source
https://github.com/advisories/GHSA-273p-m2cw-6833
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/01/GHSA-273p-m2cw-6833/GHSA-273p-m2cw-6833.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-273p-m2cw-6833
Aliases
Downstream
Published
2026-01-22T18:41:23Z
Modified
2026-01-23T16:06:07.355356Z
Severity
  • 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L CVSS Calculator
Summary
Rekor's COSE v0.0.1 entry type nil pointer dereference in Canonicalize via empty Message
Details

Summary

Rekor’s cose v0.0.1 entry implementation can panic on attacker-controlled input when canonicalizing a proposed entry with an empty spec.message. validate() returns nil (success) when message is empty, leaving sign1Msg uninitialized, and Canonicalize() later dereferences v.sign1Msg.Payload.

Impact

A malformed proposed entry of the cose/v0.0.1 type can cause a panic on a thread within the Rekor process. The thread is recovered so the client receives a 500 error message and service still continues, so the availability impact of this is minimal.

Patches

Upgrade to v1.5.0

Workarounds

None

Database specific 
{
    "nvd_published_at": "2026-01-22T22:16:19Z",
    "cwe_ids": [
        "CWE-476"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-01-22T18:41:23Z",
    "severity": "MODERATE"
}
References

Affected packages

Go / github.com/sigstore/rekor

Package

Name
github.com/sigstore/rekor
View open source insights on deps.dev
Purl
pkg:golang/github.com/sigstore/rekor

Affected ranges

Type
SEMVER
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.5.0

Database specific

last_known_affected_version_range

"<= 1.4.3"

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/01/GHSA-273p-m2cw-6833/GHSA-273p-m2cw-6833.json"